Viewing archive of Sunday, 25 June 2000
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2000 Jun 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 177 Issued at 2200Z on 25 JUN 2000IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z SOLAR ACTIVITY INCREASED TO MODERATE LEVELS DUE TO A
PAIR OF M-CLASS FLARES. THE FIRST WAS AN M2/SF AT 25/0114Z WITH AN
ASSOCIATED LOOP PROMINENCE SYSTEM FROM REGION 9042, NOW ABOUT A DAY
BEYOND THE WEST LIMB. THE SECOND WAS AN M1/2N AT 25/0752Z FROM
REGION 9046 (N21W61). THIS REGION SHOWED NO SIGNIFICANT CHANGES
DURING THE PERIOD AND REMAINED A SMALL, MIXED-POLARITY SPOT GROUP.
MINOR GROWTH WAS REPORTED IN REGIONS 9054 (N12W04) AND 9058
(S14W41). THE REMAINING REGIONS WERE STABLE AND SIMPLY-STRUCTURED.
AN ERUPTIVE PROMINENCE WAS OBSERVED AT NE26 AROUND 25/1200Z. NEW
REGION 9062 (S19E72) WAS NUMBERED.
IB. Solar Activity Forecast
ACTIVITY IS EXPECTED TO BE AT LOW TO
MODERATE LEVELS. ISOLATED M-CLASS FLARES ARE POSSIBLE DURING THE
PERIOD.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
GEOMAGNETIC FIELD ACTIVITY DECREASED TO QUIET TO UNSETTLED LEVELS. A
GREATER THAN 10 MEV PROTON FLUX ENHANCEMENT AT GEOSYNCHRONOUS ORBIT
BEGAN AROUND 25/1300Z, LIKELY ASSOCIATED WITH THE M1/SF LIMB-FLARE
FROM OLD REGION 9042.
IIB. Geophysical Activity Forecast
GEOMAGNETIC FIELD ACTIVITY IS
EXPECTED TO INCREASE TO UNSETTLED TO ACTIVE LEVELS DURING 26 - 27
JUNE DUE TO CORONAL HOLE EFFECTS. BRIEF MINOR STORM CONDITIONS MAY
ALSO OCCUR DURING THIS PERIOD. FIELD ACTIVITY IS EXPECTED TO
DECREASE TO QUIET TO UNSETTLED LEVELS ON THE FINAL DAY OF THE
FORECAST PERIOD. THE GREATER THAN 10 MEV PROTON FLUX AT
GEOSYNCHRONOUS ORBIT IS EXPECTED TO RETURN TO BACKGROUND LEVELS
EARLY TOMORROW. THE GREATER THAN 2 MEV ELECTRON FLUX AT
GEOSYNCHRONOUS ORBIT IS EXPECTED TO REACH MODERATE TO HIGH LEVELS
LATE IN THE PERIOD.
III. Event Probabilities 26 JUN to 28 JUN
| Class M | 30% | 30% | 35% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 25 JUN 175 Predicted 26 JUN-28 JUN 160/155/155 90 Day Mean 25 JUN 185
V. Geomagnetic A Indices
OBSERVED AFR/AP 24 JUN 010/017 ESTIMATED AFR/AP 25 JUN 006/010 PREDICTED AFR/AP 26 JUN-28 JUN 018/030-015/020-012/012
VI. Geomagnetic Activity Probabilities 26 JUN to 28 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 25% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 30% |
| Minor storm | 25% | 25% | 20% |
| Major-severe storm | 10% | 10% | 01% |
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